20210101222101 has 64 divisors (see below), whose sum is σ = 33674247936000. Its totient is φ = 10738341965568.

The previous prime is 20210101222061. The next prime is 20210101222123. The reversal of 20210101222101 is 10122210101202.

It is not a de Polignac number, because 20210101222101 - 2²² = 20210097027797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210101226101) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5507871 + ... + 8411708.

It is an arithmetic number, because the mean of its divisors is an integer number (526160124000).

Almost surely, 2^{20210101222101} is an apocalyptic number.

20210101222101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20210101222101 is a deficient number, since it is larger than the sum of its proper divisors (13464146713899).

20210101222101 is a wasteful number, since it uses less digits than its factorization.

20210101222101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13919703 (or 13919689 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20210101222101 its reverse (10122210101202), we get a palindrome (30332311323303).

The spelling of 20210101222101 in words is "twenty trillion, two hundred ten billion, one hundred one million, two hundred twenty-two thousand, one hundred one".